Water heating and deaerating apparatus



Jan, 11.2, 1932'.

J. A. POWELL WATER HEATING AND DEAERATING APPARATUS 5 Sheets-Sheet 1Filed Sept. 9. 1927 INVENTOR J/VMEJ A. 1 0 544 ATTORNEY Jan. 12, 1932.J. A. POWELL WATER HEATING AND DEAERATING APPARATUS rll-l II-rllllINVENTOR (IA/v55 14. Poms-4L Jan. 12, 1932. J. A. POWELL WATER HEATINGAND DEAERATING APPARATUS 3 Sheets-Sheet 5 Filed Sept. 9. 1927 w w w w m1N VEN'IOR Jmm ,4. Pan/a4 Patented Jan. 12, 1932 NITED STATES PATENTOFFICE JAMES A. POWELL, or READING, PENNSYLVANIA, Ass eNoa T cocHaANECORPORA- TION, or PHILADELPHIA, rENNsYLvANIA. A CORPORATION 01PENNSYLVANIA WATER HEATING AND DEAERATING APPARATUS Application filedSeptember 9, 1927. Serial No. 218,382.

The general object of my present invention is to provide an improvedarrangement and construction of apparatus for efiiciently heating anddeaerating water. More specifically the object of my present inventionisto provide water heating and deaerating apparatus in which a waterheater of the jet or water spray type is effectively combined with anopen water heater of the tray type, and in W which the main waterheating effect is attained in the jet heater, and the final deaeratingand water heating effect is attained in the tray type heater. WVith myimproved water heating and deaerating apparatus, I

make use of the simplicity and compactness of structure and otheradvantageous characteristics of the jet or water spray type heater, andalso obtain the water storage capacity and high deaerating propertieswhich are characteristic of the tray type open water heater.

The various features of novelty which characterize my invention arepointed out with particularity in the claimsannexed to and forming apart of this specification. For

a better understanding of the invention, however, and the advantagespossessed by it reference should be had to the accompanying drawings anddescriptive matter in which I have illustrated and described a preferredembodiment of the invention.

Of the drawings:

Fig. 1 is an elevation with parts brokenaway of a preferred arrangementand construction of my apparatus;

Fig. 2 is a plan view of the apparatus of Fig. 1;

Fig. 3 is an end view of the apparatus of Fig. 1 partly in'section; jFig. 4 is an elevation partly in section of a modified form of myinvention; and

Fig. 5 is'an end view of the apparatus of Fig. 4.

1n the drawings and particularly in Figs. 1, 2 and 3, I have illustrateda preferred embodiment of my invention comprising a jet heater A incombination with an open deaerating heater B for heating and deaeratingboiler feed water.

The jet heater of my invention may well i in all directions.

be, and as shown is of the general type illustrated in my prior Patent1,621,853, granted March 22, 1927 and comprises a substantially coneshaped casing A having an exhaust steam inlet A at the top thereof andprovided. with a single spray nozzle C and a plurality of series ofwater discharging nozzles C and C vertically spaced in the heater casingand arranged to discharge jets of water toward the vertical center lineof the heater. The spray nozzle C has a perforated nozzle plate Cfarranged to discharge a plurality of radial jets from one side of theheater casing The lower nozzle series C and C are arranged in an annularcasing C surrounding the heater casing A anddivided by a horizontal anular partltion G into u per andlower com partments C and C". n theannular compartment C is arranged the plurality of inclined spraynozzles C and in the compartment C the nozzle series C The jet' heateris provided with means for inter-mingling thewater with the steam and.other gases after the steam has passed through the water barrier formedby the spray nozzles. In the construction shown,- an annular convergingbafile D is arranged below the spray nozzle C. The portion-of the.casing A below the nozzle series C and C is formed with a convergingsection D connected at its lower end to any inlet compartments B of thedeaerating heater B.

The steam supply for the jet heater passes from the auxiliary apparatus'(not shown) through a multi-port valve E and the pipe E to the steaminlet A of the heater. The water supply for the nozzle series C and Cconsists of the condensate from the condensers or other apparatus whichis passed through the pipe F into a vent condenser G supported on andabove the deaerator B by standards G. In the vent condenser, thecondensate is passed through a plurality of pipes extendinglongitudinally of the condenser wherein it is heated by the air andother non-condensable gases from the heaters A and B. The heatedcondensate passes from the condenser through the pipes F and F to thelower compartment C of the annular casing C where it is dis- 100 chargedinto the casing through the nozzles C The supply of water to the nozzlesC in the upper compartment C is controlled in such a manner that wateris not discharged through these nozzles until the water supply is morethan suflicient for the lower series C In the construction shown, avertical loop pipe sec-- tion' F is connected at one end to the pipe Fand has its other leg connected into the upper part of the compartmentC". With this arrangement, the nozzles C will not discharge water untilthe head in the pipe F is sufilcient to force the water throughthevertical loop F. This arrangement is especially advanta geous where thewater supply is very low at periods and provides at least one water barpipe F to the spray nozzle G. r A valved branch pipe F extendsdownwardly from the pipe F into the reservoir compartment of the heaterB to provide means for adding make-up water directly to the heater B. Anequalizing pipe connection F is arranged between the top of the loop andthe jet heater casin to prevent-any siphoning action in the l oopsection. The amount of cold make-up water which is required varies withthe boiler load in contrast with the amount of condensate for thenozzles C and C, which remains substantially constant under varyingboiler loads.

The open deaer'ating water heater B of the present invention is of thehorizontal cylindrical type and comprises an outer shell enclosing aninlet water reservoir compartment B, into the top of which the lower endof the jet heater is connected for receiving .the discharged mixture ofWater and gases, a tray compartment B wherein the water is furtherheated and deaerated and a water storage compartment B at the bottom ofthe heater. The mixture of water, air and other non-condensable gasespasses into the compartment B at one end thereof and is directed arounda depending vertical-baffle H to a vent'pipe J mounted in the top of theother end of the compartmentand having its opposite end connected to thetray compartment 13 at a point adjacent a vent pipe B from the traycompartment. The mixture passing into the water pool in the compartmentB constantly agitates the mixture in that compartment and separates outmost of the air and gases entrained by the water in its passage throughthe lower part of the heater A, the gases passing out through the ventpipe J.

The water and condensed steam from the jet heater accumulates in thebottom of the compartment B until its level is suflicient to overflowinto and fill a pair of rectangular water boxes K extendingsubstantially throughout the tray compartment B Each water box K islocated above and supported by a bank of superposed deaerating andheating trays K. Each of the trays K is supported by frame work Ksecured to the heater shell. The trays K are vertically spaced from oneanother and each comprise-s a horizontal perforated bottom plate K andupturned side and end walls K on which is supported the upper adjacenttray.

At the bottom of the water storage compartment B is. located a wateroutlet B to the boiler feed pump (not shown). Atone end of thecompartment B is located an overfiow outlet B having a skimmer bafile Bat its inner end and arranged to remove the surplus water when the waterlevel rises above the upper end of the bafile. At the other end of theheater B is arranged a drain pipe B for draining water from thecompartment B to the storage space when the heater is to be cleaned orrepaired.

In the operation of the deaerating heater described, steamis passed fromthe valve E through a vertical pipe E into a steam inlet compartment Khaving a vertical bafile K on the inner side thereof extendingdownwardly to a point adjacent the upper row of trays K. The wateroverflowing from the water boxes K passes downwardly in minute streamsonto the trays K Where it flows through the perforated plates in afinely divided condition. The steam passes into the tray section flowingbetween and around the superposed trays in intimate contact with thedownflowing water which is heated by the steam to such a temperature,approximately 212, that the air and other non-condensable gases, if any,remaining in the water after its treatment in the jet heater areseparated out by the action of the steam and pass out of the traycompartment through the vent pipe 13 together with the vented mixturefrom the vent pipe J. The deaerated water falls into the storagecompartment from which it is removed as needed through the pump supplyoutlet B. The vented mixture passes through the pipe B into the top ofthe condenser G where, after circulating around the condenser tubes, itpasses to the atmosphere through the vertical pipe G The vent condenserG is provided with a drain pipe G connecting the bottom of the condenserto the water storage compartment. An atmospheric relief valve B ismounted in the top of the heater shell for the usual purpose.

-Automatic means are provided for regulating the flow of cold make-upwater to the the water level in the storage compartment of the heater G.In the present construction the control means comprise a pivoted float Mcondenser G and nozzle C in accordance with in the storage spaceoperating a lever arm M to regulate a valve M in the pipe line F Theapparatus disclosed is comparatively simple and forms an eifectivesystem for heating the water in stages and elfectively freeing it fromair and other gases held in the water. My invention is characterized bythe efiec-' tiveness of the combination of heaters and the relativelylowcost of construction of the type of heater disclosed.

In the modification illustrated in Figs. 4; and 5, the same gencral formand arrangement of apparatus is provided with some additional featuresof construction for special conditions of operation. Aof Figs. 4 and 5is provided withtwo series of water discharge nozzles and a verticaldowncomer water supply pipe N connected to the upper part of the jetheater and extending downwardly to a point adjacent a steam inlet 0 anddeflecting baflie 0 located in the side of the heating chamber. Thearrangement of the remaining parts are substantially the same asheretofore described, except for a vent pipe 7' from the part of theheater adjacent to and behind the converging baffle (P. The mixture ofwater, vapor and air passes through the jet heater with the sameparallel flow as in the other construction and the air and gases arewithdrawn by the pipe j to a condenser 9 divided into a number ofseparate compartments 9 g and g by vertical and inclined vbafiles g5 and9 respectively.

The deaerating heater B of the modification is provided with a traycompartment 6 containing a plurality of tray stacks R and B In thisconstruction, the tray stack R is constructed and arrnaged similarly tothe stack K of the previous construction. The tray stack R is 'below andvertically spaced from the stack R and comprises a plurality ofoppositely inclined trays of lesser width at. pressure equalizing pipe Sconnects the lower part of the heater A with the upper than the trays ofthe stack R and which actto separate the air and other non-condensablegases from the water. WVater boxes is are located above the upper traystack from which the water overflows onto the tray stack R.

part of the tray compartment of the heater B. With the modifiedconstruction described,

steam is admitted through an inlet pipe'e and passes below the reservoircompartment 6' and balfle h and horizontally through the tray stackR tothe opposite end of the. heater where the stream is reversed and returnsthrough the baffles R. to a vent pipe 12 and the vent condenser g. Thesupply of condensate to the jet heater is regulated by the valve mcontrolled by the float m in the storage space of the deaerating heater.The vent pipes and b are connected; into separate compartments 9 and grespectively in the vent condenser g. The condenser g is provided withThe jet heater a pair of steam jet ejector pumps T having a live steaminlet T and connections T and T to the compartments 9 and 9 throughwhich the vent gases are withdrawn by the ejector. The e'ected gases andsteam are arranged to disc arge through the condenser compartment 9where the greater portion of the heat content of the mixture is given tothe water in the pipes. V and V connect the condenser compartments 9 gand g? respectively to the storage space of the heater. The separationof the vent pipes is especially advantageousas with a single connectionfrom both heaters the vent condenser capacity might be absorbed entirelyby the gases issuing from one of the u Drain pipes T heaters and thegases from the other heater excluded or at least inefliciently removed.

\Vhile in accordance with the provisions of the statutes, I haveillustrated and described the best form of embodiment of my inventionnow known to me, it will be apparent to those skilled in the art thatchanges may be made in the form of the apparatus disclosed withoutdeparting from the spirit of my invention as set forth in the appendedclaims and that in of an open deaerating heater having a water reservoirspace receiving the discharge mixture from said jet heater, a tray stacklocated at one side of said reservoir space and a water box receivingthe overflow from said reservoir space and adaptedto pass waterdownwardly onto said tray stack.

2. Apparatus for heating and deaerating boiler feed water comprising thecombination with a jet heater having a heating chamber, spray nozzlesdischarglng water into said chamber to form a water barrier across asection of said heating chamber and means for passing steam downwardlythrough said barrier, of an open deaerating water heater havingan inletreservoir compartment connected to said jet heater and receiving thedischarge therefrom, a tray compartment receiving the overflow from saidreservoir compartment, means for passing saidwater downwardly throughsaid tray compartment, and means for passing steam in intimate contactwith said water, whereby the boiler feed water is heated and deaeratedby a two stage treatment. I

3., Apparatus for heating and deaerating boiler feed water comprisingthe combination with a jet heater having a heating chamber,

Ill

water discharge nozzles forming a water barrier through one section ofsaid chamber, and means for passing steam downwardly through said heaterfor heating and deaerating said water, of an open deaerating waterheater having an inlet reservoir compartment connected to the lower endof said et heater and receiving the discharge therefrom, a tray stackcompartment having a water connection with said inlet compartment, meansfor passing water downwardly through said tray stack in a finely dividedcondition and means I for passing steam in intimate contact 'with saiddownfiowing Water, and means for separately venting each of said heatersto a vent condenser.

water downwardly onto said tray stack,

means for passing steam horizontally through said tray stack, a ventcondenser having separate compartmentstherein, and a conduit connectingone of said compartments with the top of the tray compartment and asecond conduit connecting another of said compartments with the lowerportion of said jet heating chamber.

5. Apparatus for heating and deaerating water comprising the combinationwith a heater of the jet type wherein water to be heated and deaeratedis subjected to the heating and deaerating action of steam, of an opendeaerating tray heater extending horizontally below said jet heater andhaving liberated from the water in each heater separately into saidcondenser.

7. Apparatus for heating and deaerating water comprising the combinationwith a heater of the jet type wherein water to be heated and deaeratedis subjected to the action of steam, of an open deaerating heaterextending horizontally below said jet heater and arranged to receive thewater discharged from the latter, a substantially horizontal bank oftrays below and at one side of the point of discharge from said jetheater, a condenser having a plurality of separate compartments, andmeans for separately connecting each heater to separate compartments ofthe condenser for passing an air-steam mixture including the airliberated from the water in each heater into said condenser. Signed atReading, in the county of Berks and State of Pennsylvania, this 7th dayof September, A. D. 1927.

JAMES A. POWELL a water reservoir compartment arrangedto receive thewater discharged from the latter, a tray compartment in said tray heaterhaving a substantially horizontal bank of trays below and at one side ofthe point of discharge from said jet heater, meansfor passing steamhorizontally through said tray bank and means for venting of said traycompartment through an opening in the top of said heater adjacent saidreservoir compartment. I.

6. Apparatus for heating ,and deaerating water comprising thecombination with a heater of the jet type wherein Water to be heated anddeaerated is subjected. to the action of steam, of an opendeaeratingheater extending horizontally below said jet heater 1 and arranged toreceive the water discharged from the latter, a substantially horizontalbank of trays ad acent the point of discharge from said jet heater, acondenser, and means for passing the mixture including the air

